1 August 2018 is Nag Panchami in Bengal. Nag Panchami in Bengal is observed on Shukla Paksha Panchami in Shraban Month in Bengali calendar.
Usually, Nag Panchami Manasa Puja & Ashtanag Puja is observed for more than four times in Aashar month and Shravan month in Bengal. Goddess Manasa Devi and Ashtanag Devtas are worshipped on Nag Panchami Puja.
Nag Panchami in North India and other places of India (except Gujarat) date is 15 August 2018. In Gujarat it is observed 15 days later.
1 August 2018 – Naag Panchami Monosha Puja, Ashtanag Puja
17 August 2018 – Monosha Puja, Ashtanag Puja